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1xEV-DO Signaling
R&S
®
CMW-KM8xx/-KS8xx
16
User Manual 1173.9511.02 ─ 12
The default settings of the R&S
CMW generally ensure a forward signal with suitable
characteristics for session negotiation and connection setup. The most important set-
tings can be modified directly in the main view.
Performing measurements
The required settings vary depending on the measurement to be performed. However,
the general procedure outlined below is applicable to most measurements.
1. Connect your AT to the R&S
2. Configure the "1xEV-DO Signaling" application according to the test to be per-
formed.
3. To turn on the forward signal, press ON | OFF and wait until the "1xEV-DO Signal-
ing" softkey indicates the "ON" state and the hour glass symbol has disappeared.
4. Switch on the AT.
The AT synchronizes to the forward signal and initiates a session negotiation. The
R&S
CMW enters the "Session Open" state.
5. Press the "Connect" hotkey to set up a connection.
Note the connection states displayed in the main view and wait until the AT state
indicates "Connected". In connected state, the main view provides also session
details and AT information.
6. To switch to the measurement application, press the "Go to..." softkey. The "1xEV-
DO RX Measurement" is provided by the 1xEV-DO signaling firmware application.
The "1xEV-DO Multi Evaluation" measurements are available as option
R&S CMW-KM880.
In the latter case, the softkey also selects the combined signal path scenario in the
measurement. The scenario allows you to use the measurement in parallel to the
signaling application and configures compatible measurement settings (e.g. RF
and trigger source settings).
7. Configure and start the measurement.
Trigger Source for Multi Evaluation Measurements
In the "1xEV-DO Multi Evaluation" measurement use an "1xEV-DO Super Frame" trig-
ger source to obtain valid transmit time error results.
Checks in case of failed session negotiation
If session negotiation fails, check the following R&S
CMW settings:
●
The AT must support the selected 1xEV-DO band class.
●
The "Expected Power" must be in accordance with the reverse signal power.
●
The "1xEV-DO Power" must be sufficient so that the AT under test can receive the
forward link signal.
●
The external attenuation settings should be in accordance with characteristics of
the RF connection.
General Description
深圳德标仪器
135-1095-0799